During the first year of Obama’s second term，the overall strategic circumstances of the United States have changed. Thanks to the economic recovery，the United States adjusted domestic structure，shaped rules abroad and strengthened the base of economic hegemony. It tried to break through political dilemma and reduce interventions from domestic politics. On the surface，the US foreign strategy was enslaved to domestic political struggle，particularly its Middle East policy and “rebalancing strategy” in Asia Pacific；fundamentally，the United States continued to deepen its strategic adjustment on the track of keeping stability at home，applying pragmatic and efficient policies，and designing a long-term plan based on strategic extension of the first term “smart power”. Its overall strategy emerged from crisis response to hegemony reconstruction，from focusing on the Asia Pacific to considering the whole world，from rectification to shaping the future. As an important part of America’s global strategy，Sino-US relations have presented smooth development and new highlights. However，the strategic game between China and the United States did not alleviate. Although high-level leaders of two countries reached an important consensus about “new type of major powers relations”，how to transform consensus into action，and how to regard this as an opportunity to build a strategic long-term relationship still has a long way to go.